TW201417623A - Management system used for unifying LED light colors and method thereof - Google Patents

Abstract

The invention provides a management system used for unifying LED light colors and the method thereof. The management system is used for unifying projection light colors of a plurality of display units. Each of the display units is provided with at least one light emitting diode with a color coordinate and a luminance value. The management system reads the coordinates and luminance values of the different colors and compares them with a determined color coordinate and a determined luminance value, so that a coordinate variation value of the light emitting diodes is formed and the duty ratio of pulse width modulation signals of the display units are corrected for adjusting driving current of the light emitting diodes and the color coordinates are moved to a position of the determined corresponding color coordinate. Therefore, colors of the light emitting diodes can be identical to the primary color through software adjustment. No color difference exists in mixed color and the display effect is improved.

Description

Management system for unifying LED light color and method thereof

The invention belongs to the technical field of a color difference adjustment system of a Light Emitting Diode (LED) display device, in particular to a management system and method for unifying LED light color, and the device is adjusted by means of software adjustment. The LEDs of the same color system all exhibit the same primary color, and improve the light mixing quality and achieve the effect of no color difference.

Color Gamut is a range of areas where display devices, printers, and printers can display the largest number of colors, and is a visual representation of the color gamut concept. Commission International de l'Eclarrage, CIE The CIE-xy chromaticity diagram is developed to indicate the range of colors that can be presented by the device through a two-dimensional space ruler. The LED display device is formed by combining LEDs of three different primary colors of red, green and blue to form a light source, and arbitrarily changes the color of the projected light by mixing different proportions of the three primary colors of light. Corresponding to the CIE-xy chromaticity diagram, the red, green and blue lights that can display the maximum tolerance of the display device are respectively marked on the corresponding position on the ruler, and the triangles formed by the frame are The color gamut range that the display device can present, and the larger the triangle area, the wider the color gamut.

Moreover, the giant LED screen installed in the building is composed of a plurality of LED panels, for example, panels a, b, c, and d, in order to consider the color consistency of the overall display screen, and the color gamut range of each panel is It needs to be identical. Therefore, these panels need to be assembled by LEDs with the same brightness and chromaticity. However, affected by LED manufacturing characteristics, even It is produced by the same factory. Different batches of factory-made LEDs still have different Bin codes and different RGB primary colors. As shown in Figure 1, the panels are in different gamut ranges. At this time, each panel is utilized. The projection light Ta, Tb, Tc, and Td formed by mixing 30% red light, 80% green light, and 20% blue light also have different chromaticities, which causes the chromatic aberration of the screen and affects the display quality.

In order to improve the above phenomenon, the equipment factory selects the LED of the same brand and Bin as the production material, but the method is not only difficult to implement but also costly due to the limitation of the supply of the material and the yield.

In view of this, how to solve the problem of chromatic aberration between LED panels while considering economic benefits is the subject of the present invention.

In view of the problems of the prior art, the object of the present invention is to provide a management system for unifying LED light color and a method thereof for unifying the projection light of each panel or lamp when displaying a picture by using a plurality of LED panels or lamps simultaneously. The use of color, to enhance the display quality of the screen to meet the visual needs.

According to the purpose of the present invention, the management system for unifying LED light color includes a plurality of display units, a processing unit and a correction unit, wherein the processing unit is provided with a plurality of fixed color coordinates and a plurality of fixed brightness values, and Telecommunications connect the display units and the correction unit. Each of the display units is provided with at least one light emitting diode having a color coordinate and a brightness value, and the management method of the management system includes the following steps: detecting whether each of the display units records the light emitting diode The color coordinate and the brightness value of the body; when the display unit records the color coordinate and the brightness value, the processing unit reads the color coordinate and the brightness value to respectively sit on the color a certain color coordinate corresponding to the corresponding color, and the brightness value corresponding to a certain bright value; the processing unit calculates a coordinate variation value of the one of the light emitting diodes; and the correcting unit receives and corrects a pulse width by using the coordinate variation value The spatial ratio of the Pulse Width Modulation (PWM) signal is adjusted to adjust the driving current of the LED to move the color coordinate to the corresponding fixed color coordinate.

The illuminating color sources of the illuminating diodes are red light having a wavelength of 610 nm to 670 nm, green light having a wavelength of 510 nm to 550 nm, and blue light having a wavelength of 440 nm to 4900 nm, and the color coordinate is a CIE color system (CIE Colour System). The two-dimensional scale, the brightness value is set in the 0~n level system, and n is 50~1000.

Moreover, the light-emitting diode system detects the color coordinate and the brightness value at the time of shipment, and stores the color coordinate and the brightness value in the display unit. Alternatively, when the display unit does not record the color coordinate and the brightness value, the management system further detects the light emitting diode by using a detecting unit to obtain and record the color coordinate and the brightness value.

In order to make the color gamut range that can be presented by the display unit meet the actual requirements, the fixed color coordinate and the fixed light value are preset parameter values. Alternatively, the processing unit integrates the color coordinates and the brightness values to form a coordinate set and a brightness set of the red, green, and blue lights, and calculates each of the coordinate sets and each of the brightness sets to respectively acquire the set. The fixed color coordinate and the predetermined bright value are formed by the average value. In this way, by extracting the intersection value from the difference in characteristics between the display units, an appropriate color gamut range can be flexibly defined to improve the ease of operation of the system.

In summary, the present invention adjusts the color coordinates of each of the light-emitting diodes to preset coordinate values by using a software program to be uniformly installed on different display orders. The primary color chromaticity of the light-emitting diodes of the element, so that the display units can all be in the color gamut of the same region under the condition of low cost and consumption, thereby greatly improving the economic efficiency.

In order for your review board to have a clear understanding of the contents of the present invention, please refer to the following description for matching drawings.

Please refer to FIG. 2, which is a system block diagram of a first embodiment of the preferred embodiment of the present invention. As shown in the figure, the management system 1 for unifying LED color includes a plurality of display units 10, a processing unit 11, and a correction unit 12, each of the display units 10 is provided with at least one LED 200 and telecommunications. The processing unit 11 is connected to the light emitting diode having a color coordinate 1000 and a brightness value 1001. The processing unit 11 is connected to the correcting unit 12 by telecommunications, and is provided with a plurality of fixed color coordinates 110 and a plurality of fixed bright values 111, and after reading the color coordinates 1000 and the brightness value 1001 of the light emitting diodes 100, respectively, A coordinate variation value 112 of each of the light-emitting diodes 100 is obtained by calculating the corresponding fixed color coordinate 110 and the predetermined bright value 111. The correction unit 12 receives the coordinate variation value 112 and corrects the space ratio of the PWM signal 210 to adjust the driving current of each of the LEDs 100 to move the color coordinate 1000 to the corresponding fixed color coordinate 110. . In this way, the primary color and light intensity of the light-emitting diodes 100 can be matched to unify the chromaticity of the light projected by the display units 10.

For example, please refer to FIG. 3 to FIG. 5 respectively, which are respectively a system block diagram, a method flowchart and a usage diagram of a second embodiment of the preferred embodiment of the present invention. The present invention can be installed on an LED. The display device 2, for example, a giant LED screen, an LED curtain wall or an LED floor light brick installed in a building such as a giant egg, a stadium or an office building, and a plurality of screens a, b, and c mounted on the same work platform, and In any lighting device that can use the technical means of the present invention, the display color quality and the fineness of the screen are improved by uniformly displaying the color chromaticity of a plurality of LED panels, lamps or screens of the device. Thus, the display unit 10 can be the LED panel, the lamp or the screen, and the LEDs 100 are red LEDs with a wavelength of 610 nm to 670 nm, green LEDs with a wavelength of 510 nm to 550 nm, and wavelengths of 440 nm to 4900 nm. The blue LED is composed of. The processing unit 11 and the correction unit 12 are all installed in the central controller 20 of the LED display device 2 as a software program, and the correction unit 12 is telecommunicationally connected to the power controller 21 of the LED display device 2. Moreover, the management system 1 further includes a detecting unit 13 that is connected to the display unit 10 and the processing unit 11, and the detecting unit 13 is also a software program and is installed in the central controller 20, and the management unit The management method of the system 1 is as follows: First, after the system is started, in step S1, the detecting unit 13 detects whether each of the display units 10 records the color coordinate 1000 and the brightness value 1001, for example, recorded in the screen. Inside the memory medium? If not, in step S10, the detecting unit 13 detects each of the light-emitting diodes 100 to obtain the color coordinate 1000 and the brightness value 1001, and then records the light to the wall controller brick or the central controller 20 of the work platform. Conversely, recording the color coordinate 1000 and the brightness value 1001 continues the next step. Incidentally, the color coordinate 1000 is a two-dimensional scale of the CIE color system and is denoted as ( x _i , y _i ), and i represents red light (R), green light (G) or blue light (B). Corresponding to this, the fixed color coordinates 110 are the target chromaticities ( x _{_R} , y _{_R} ), ( x _{_G} , y _{_G} ), and ( x _{_B} , y _{_B} ) of the red, green and blue LEDs respectively. The required color gamut range is divided by separately specifying the chromaticities of the three primary colors. Moreover, the brightness values 1001 of the three primary colors can be denoted as Y _i , which are respectively set in the 0~n level system, and n is 50~1000.

In step S2, the processing unit 11 reads the color coordinates 1000 and the brightness values 1001 from the display unit 10 or the central controller 20.

Next, in step S3, the processing unit 11 self-detects whether the fixed color coordinates 110 and the fixed brightness values 111 are present in the memory. If yes, the coordinate parameter values corresponding to the three primary colors (as indicated by the symbol ★ in the chromaticity diagram of FIG. 4) and the brightness parameter value are pre-set, that is, step S4. On the other hand, in step S30, the processing unit 11 integrates the read color coordinates 1000 and the brightness values 1001 to form a coordinate set of one of the three primary colors of red light, green light and blue light, and a brightness set, and calculate each coordinate set. And each of the brightness sets to divide the intersection area of the color coordinates 1000 and the intersection area of the brightness values 1001, and analyze and obtain the average value of each of the coordinate sets to form the fixed color coordinate 110 (as shown in FIG. 4 The symbol ● shown in the figure), and the average of each of the brightness sets is obtained to form the fixed brightness value 111.

In step S4, the processing unit 11 compares the color coordinate 1000 with the corresponding color coordinate 110, and the brightness value 1001 and the corresponding brightness value 111 to calculate the respective light-emitting two of the three primary colors of the RGB. One coordinate variation value 112 of the polar body 100 is transmitted to the correction unit 12. The coordinate variation value 112 can be labeled as (Δ x , Δ y ) and satisfies the following relationship:

In step S5, after receiving the coordinate variation value 112, the correcting unit 12 corrects the space ratio of the PWM signal 210 of the power controller 21 to adjust the driving current of each of the LEDs 100 to change the magnitude of the current. the color coordinates 1000 to the axial direction X CIE chromaticity diagram of the mobile △ x, △ y and the movement of the Y-axis direction corresponds to the fixer 110 of coordinates. In this way, the management system 1 can adjust the color of the primary color of the same color system by using the software calibration, so that in subsequent applications, the display units 10 are respectively mixed with 30% red light. When 80% green light and 20% blue light are used to form the projection light Ta, Tb, Tc, Ta, Tb, Tc can still produce the same color of the projected light, and effectively solve the kanban of the screen, the lamp of the lamp wall lamp or the working platform. The color difference between the screens will improve the display quality of the screen.

The above description is only illustrative of preferred embodiments and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1‧‧‧Management system

10‧‧‧Display unit

100‧‧‧Lighting diode

1000‧‧‧ color coordinates

1001‧‧‧ brightness value

11‧‧‧Processing unit

110‧‧‧ fixed color coordinates

111‧‧‧ 定亮值

112‧‧‧ coordinate variation

12‧‧‧Correction unit

13‧‧‧Detection unit

2‧‧‧LED display device

20‧‧‧Central controller

21‧‧‧Power Controller

210‧‧‧PWM signal

S1~S6‧‧‧Steps

Figure 1 is a schematic diagram of the color difference between a plurality of panels in the prior art.

Figure 2 is a block diagram of a system in accordance with a first embodiment of the preferred embodiment of the present invention.

Figure 3 is a block diagram of a second embodiment of the preferred embodiment of the present invention.

Figure 4 is a flow chart of a second embodiment of the preferred embodiment of the present invention.

Figure 5 is a schematic view showing the use of the second embodiment of the preferred embodiment of the present invention.

S1~S6‧‧‧Steps

Claims (10)

A management system for unifying LED light color, comprising: a plurality of display units respectively provided with at least one light emitting diode, wherein the light emitting diode has one color coordinate and one brightness value; and a processing unit is provided Having a plurality of fixed color coordinates and a plurality of fixed bright values and telecommunications connecting the display units, the processing unit reads the color coordinates and the brightness values and respectively compare the fixed color coordinates and the fixed brightness values, Obtaining a coordinate variation value of each of the light-emitting diodes by operation; and a correction unit electrically connecting the processing unit, receiving the coordinate variation value, and correcting an empty ratio of a pulse width modulation signal to adjust the light emission The driving current of the polar body moves the color coordinate to the corresponding fixed color coordinate. The management system of claim 1, wherein the illuminating color sources of the illuminating diodes are red light having a wavelength of 610 nm to 670 nm, green light having a wavelength of 510 nm to 550 nm, and blue light having a wavelength of 440 nm to 4900 nm. The management system of claim 2, wherein the color coordinate system is a two-dimensional scale of the CIE color system, and the brightness value is set in a 0~n-level system, and n is 50-1000. The management system of claim 3, wherein the light-emitting diode system performs the color coordinate and the brightness value detection at the time of shipment, and the color coordinate and the brightness value are stored in the display unit. The management system of claim 3, further comprising a detecting unit that is connected to the display unit and the processing unit, wherein the detecting unit detects each display unit to obtain and record The color coordinate of the light emitting diode and the brightness value. The management system of claim 4, wherein the processing unit system reads the color coordinates and the brightness values to form a coordinate set of one of red light, green light and blue light. And a set of brightness, and each of the set of coordinates and each of the sets of brightness are calculated to obtain an average value to form the fixed color coordinate and the fixed light value. A management method for a management system according to the first aspect of the patent application, comprising the steps of: detecting whether a plurality of display units record color coordinates and brightness values of at least one light-emitting diode; and when the display unit records the color And the brightness value and the brightness value are read to respectively compare the color coordinate and the corresponding certain color coordinate, and the brightness value and the corresponding certain bright value; the operation is to know the light emitting diode a coordinate variation value; and correcting the space-to-occupancy ratio of the pulse width modulation signal by using the coordinate variation value to adjust the driving current of the light emitting diode to move the color coordinate to the corresponding fixed color coordinate. The management method according to claim 7, wherein the illuminating color sources of the illuminating diodes are red light having a wavelength of 610 nm to 670 nm, green light having a wavelength of 510 nm to 550 nm, and blue light having a wavelength of 440 nm to 4900 nm. The management method of claim 8, wherein the light-emitting diode system detects the color coordinate and the brightness value when it is shipped from the factory, or when the display unit does not record the color The coordinates and the brightness values further include the following steps: detecting the light emitting diode to know and record the color coordinate and the brightness value. The management method of claim 9, wherein the fixed color coordinate and the fixed light value are preset parameter values, or after reading the color coordinate and the brightness value, the following steps are further included. : respectively integrating the color coordinates and the brightness values to form a coordinate set and a brightness set belonging to red, green, and blue light; and calculating each of the coordinate sets and each of the brightness sets to obtain an average of the sets respectively And the fixed color coordinate and the fixed light value are formed.